code: def testIFFT(self):
      self._VerifyFftMethod(
          INNER_DIMS_1D, lambda x: x, np.fft.ifft, signal.ifft
      )
  
imports: import itertools
  import numpy
  import scipy.signal
  from tensorflow.compiler.tests import xla_test
  from tensorflow.python.framework import dtypes
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import gradients_impl
  from tensorflow.python.ops.signal import signal
  from tensorflow.python.platform import googletest
label_desc: Use image node_id 6 for calling the FFTTest obj's underlying member method code with example usage: obj.testIFFT() without return types